<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>多行交叉轴对齐</title>
		<style>
			.box {
				background-color: lightgreen;
				/* 多行交叉轴使用的前提：
				 1.要有换行
				 2.在交叉轴方向有空余的空间可以移动*/
				display: flex;
				flex-wrap: wrap;
				width: 700px;
				height:350px;
				align-content: space-between; /* 交叉轴两端对齐 */
				align-content: space-around; /* 交叉轴环绕对齐 */
				align-content: space-evenly; /* 交叉轴公平对齐 */
				align-content: center; /*交叉轴居中对齐*/
				align-content: flex-start; /* 交叉轴起点对齐 */
				align-content: flex-end; /*交叉轴终点对齐*/
			}
			.item {
				width: 120px;
				height: 130px;
				border: 2px solid red;
				font-size: 30px;
			}
		</style>
	</head>
	<body>
		<div class="box">
			<div class="item">1</div>
			<div class="item">2</div>
			<div class="item">3</div>
			<div class="item">4</div>
			<div class="item">5</div>
			<div class="item">6</div>
			<div class="item">7</div>
			<div class="item">8</div>
			<div class="item">9</div>
		</div>
	</body>
</html>